{
  "number": 391,
  "date": "2026-09-24",
  "title": "Conditional equivalence of the E/J motif and the529 P/J side",
  "question": "Which source equations force529 in the successful E/J family motif, and do its admitted contexts coincide with the established common-P/J contexts?",
  "authorization": "User authorized next10 bounded steps C384–C393; next question reassessed after each completed result.",
  "scope": "Mirror/529; regular Gears Noah/Shem/Flood only; SP companion local. Fixed source inputs, no canonical/graph changes."
}